$\lim\:_{\delta\:\:x\to\:0}\left(\frac{\left(x+\delta\:\:x\right)^3-x^3}{\delta\:\:x}\right)$
$a+c=p$
$\lim_{x\to5}\left(5x\right)$
$\left(3x^4-9x^1\right)\left(7-x\right)$
$3y^3+x^2=5$
$cot^2\left(x\right)csc\left(x\right)+csc\left(x\right)=csc^3\left(x\right)$
$2y+\left(-1+5y\right)$
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